# IRS Notice Letter 3219 / CP3219A: Notice of Deficiency (90-Day Letter)

Urgency: critical · Response window: ~90 days

What it means: The IRS is assessing additional tax. You have 90 days to petition Tax Court — after that, it's final.

What to do: Calendar the 90-day deadline. Tax Court petition or pay.

taxprepservicehq.com/notices/letter-3219-cp3219a/